Quote from: franky1 on Today at 02:16:00 AM

what you would need to do is not import the seed or any private keys..
instead you would have to import the MASTER PUBLIC KEY not the sending transactions singular public key

dont follow the other peoples advice about importing private keys or seeds

i have not used electrum myself but may wallets just scan for the first address of possibilities until you press a button to check the next possibility. some wallets also dont scan the blockchain for all addresses, and some dont scan/rescan until you re-open the wallet software so it can update its position and realise it need to scan the blockchain

so simply find the MASTER PUBLIC KEY on your cold wallet. only import the MASTER PUBLIC KEY into electrum
https://bitcoinelectrum.com/creating-a-watch-only-wallet/
then check the history tab as well as the receive tab

if nothing shows up try to resync the wallet(usually simply restart the app) or
https://bitcoinelectrum.com/frequently-asked-questions/#electrum-is-stuck-at-synchronizing-what-can-i-do-to-fix-this

franky1, many thanks, this is easy to do and even I did it and the satoshis show up, but this proves nothing related to my aim, because this test would work with any seed I wanted to import into the cold wallet. But I am not interested in any seed, I am interested only in the seed created by KeepKey hardware wallet. For that to be verified a transaction should somehow be present both on the Electrum-Keep-Key hot wallet and the cold wallet generated from the Keep-key seed and this is apparently impossible to do.

In other words all that matters in this case is generated by the Electrum-keepkey hot wallet, so the public key that matters is the public key of this wallet. But if I import this public key into the cold wallet (generated from the hot wallet seed) there is no sense whatsoever.

The only other possibility mentioned in this thread is that I imported a wrong seed into the cold wallet. I checked twice and think highly unlikely, but tomorrow I may try again.

The only other way to check this verification is to send the money to an address of the "hot" wallet, rather than of the cold wallet as I did, then export the master public key of the cold wallet to a third wallet (hot) a see if the transaction appears. I do not see that other chances appeared in this thread.

But again, many thanks to all for helping me see a bit more in this matter that is certainly not trivial.
At least this is what I understand from this thread, with the kind help